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SUMMARY: λgt WES derivatives carrying the citG (fumarase) gene of Bacillus subtilis have been detected by complementation of an Escherichia coli fumarase mutation in lysogen-filled plaques. The gerA gene, mutations in which affect the germination response of spores to l-alanine, is also present on the two citG transducing phages described. The cloned regions in these two phages include EcoRI-generated fragments of 5·0 kb and 1·4 kb; the former fragment carries citG4 +.
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